package chapter17;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * Created by VIC.Huang on 2017/2/7.
 * The Collections.fill() & Collections.nCopies() method
 */
public class FillingLists {
    public static void main(String[] args) {
        List<StringAddress> list = new ArrayList<StringAddress>(
                Collections.nCopies(4, new StringAddress("Hello"))
        );
        System.out.println(list);
        Collections.fill(list, new StringAddress("World"));     // 只是替换list中存在的元素，无法添加新的元素
        System.out.println(list);
    }
}

class StringAddress {
    private String s;
    public StringAddress(String s) {
        this.s = s;
    }
    public String toString() {
        return super.toString() + " " + s;
    }
}
